diff --git a/Include/typeslots.h b/Include/typeslots.h
index f56749dbedb..a89d73b823f 100644
--- a/Include/typeslots.h
+++ b/Include/typeslots.h
@@ -79,3 +79,4 @@
 #define Py_am_await 77
 #define Py_am_aiter 78
 #define Py_am_anext 79
+#define Py_tp_finalize 80
diff --git a/Misc/NEWS b/Misc/NEWS
index 0d3a0f0d793..2de47f713a8 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,8 @@ Release date: 2015-07-05
 Core and Builtins
 -----------------
 
+- Issue #24345: Add Py_tp_finalize slot for the stable ABI.
+
 Library
 -------
 
diff --git a/Objects/typeslots.inc b/Objects/typeslots.inc
index bcbe0af3b8f..dc750cc0c41 100644
--- a/Objects/typeslots.inc
+++ b/Objects/typeslots.inc
@@ -78,3 +78,4 @@ offsetof(PyHeapTypeObject, as_number.nb_inplace_matrix_multiply),
 offsetof(PyHeapTypeObject, as_async.am_await),
 offsetof(PyHeapTypeObject, as_async.am_aiter),
 offsetof(PyHeapTypeObject, as_async.am_anext),
+offsetof(PyHeapTypeObject, ht_type.tp_finalize),